Spindle rapid advances beyond setting of advance rapid travel length adjustment.
|
Probable Cause |
Check |
Remedy |
| Air in hydraulic system. | Check for oil leaks around body of unit. | Reseal leaking area or return to factory for repair. |
| Seal on quill piston in cylinder assembly is worn or broken. | Complete lack of control of spindle travel. | Replace piston seal. Ref. Cylinder Assy. Bul. |
| Hydraulic piston section retaining ring in cylinder assembly, loose or broken. | Complete lack of control of spindle travel. Oil leaks into drive shaft area. | Replace - Ref. Cylinder Assy. Bul. |
| Advance plunger assembly in manifold sticks due to defective "O" rings. | Plunger movement should follow lever movement. | Replace "O" ring or complete assembly - Ref. Manifold Assy. Bul. |
| Oil too heavy in hydraulic system. | 40 to 100 viscosity (light) hydraulic oil recommended. | Drain and refill by cycling unit. Ref. Bul. 21085-00. |
| Dirt in advance plunger valve assembly in manifold. | Remove and inspect valve for dirt. | Clean and reinstall. Ref. Manifold Assy. Bul. |
